Transmission Oil Inspection

WARNING: This page is about a different car, the 2005 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

Remove the check plug A.
Verify that the oil is at the brim of the check plug hole as shown.
- If it is low, add the specified oil from the check plug hole.
  Specified oil
  
  Grade:API service GL-4 or GL-5
  
  Viscosity:SAE 75W-90 (All season) or SAE 80W-90 (Above 10°C {50°F})
  
  Fig 1: Removing Plug & Checking Oil Level
  Courtesy of MAZDA MOTORS CORP.
Wipe the plug clean and apply sealant to the plug threads before installing.
Tightening torque

A:25-39 N.m {2.5-4.0 kgf.m, 19-28 ft.lbf}